Flexible high frequency line



May 7, 1935. L. WALTER 2,000,679

FLEXIBLE HIGH FREQUENCY LINE Filed Feb. 6, 1952 INVENTOR LUDWIG WALTERATTbRNEY Pstsato'd May 7,1935

M Walter, Berlin, Teldllnken Application February a, 1m, Serial No. am-InGennanyFebruar-y7,193l

50mins. 'lhepresentinventionisconcernedwithaflexinternal conductor whichis co-axially surrounded 5 bysnouterconductorconsistingoiapluralitycllinkswhichareconnectedbymeansotioints.'lhebestplanistobuildtheouterconductorot the co-axial line bipartite, i.e., of two shell- Adioining links are united by I of insulation materialwhich keep the outer current-carrying conspaced apart. tion is ustratedin the drawing. threaded upon the inner conductor insulating rings orbeads P conporcelain or the like. The outer consemi-cyllndrical shellsSI. 8: c copper sheeting which arekept apart the inner conductor by theinsulator rings are shifted or threaded upon the inner conductor. Theshells Si and B; have at their ends spherical surtaces which engage overone another and which most suitably are press-flttedoverthesimilarlysphericalinsulatorringsbythe aiddanouteroopperringR.Inthismanner ball or universal Joints are constituted betweentwoeonsscutiveiinks. Inordertoinsureanair time; E5

and water tight sql the outer conductor may be'pmvldedwithaleadsheathlfiiandhsalocated instdethesheathssiandsz.Overtheouter ing allrge pitch. these spirals extending unin-.

from one end of the cable to the other. As a rsult there is'obtained asmooth cylindrical suriaee upon which a copper sheath or cover maybebroughtsosstoinsureanairandwatertight seal.

What is claimed is:

l. A flexible radio frequency line comprising inner and outer conductorsspaced apart by in-' sulating rings whose outer periphery is roundedover to form an element of a ball Joint, said outer conductor consistingof a plurality of horizontally split tubular links of relatively shortlength, each oltheendsotsaidlinkshavlng their endsi'ormed in sphericalmanner to engage and forming theotherelementotsaidballiointsaidlinksbeing island by an outer holdingring.

Joints, the latter being pressed (Cl. 173-285) v 2. A flexible radiofrequency line comprising inner and outer conductors spacedconcentrically apart by insulated rings having "their outer peripheryrounded over to form an element of a ball joint, said outer conductorconsisting of a 5 plurality oi semi-cylindrical tubular links ofrelatively short length, each of said links having their ends formed toengage the end 01' another similar tubular link, and each of said linkends shaped to engage the outer periphery of said in- 10 sulated rings,each of said links Joined by a plurality of metallic rings which arebent to conform with the ends oi said links.

3. A flexible radio frequency line comprising inner and outer conductorsspaced concentrically l6 apart by a plurality of insulators having theirouter periphery rounded over to form an element of a ball joint, saidouter conductor consisting of a plurality of semi-cylindrical tubularlinks of relatively short length, each of said links having their ends.iormed to engage the end of another similar tubular link, and each ofsaid link ends shaped to engage the outer periphery of said insulatedrings, each 01' said links Joined by aplurality of metallic rings whichare bent to conform with the ends of said links, said outer conductorsand said metallic rings being completely covered by a spiral winding oia band of metallic tape.

4. A flexible radio frequency line comprising inner and outer conductorsspaced concentrically apart by insulated rings having their outerperiphery rounded over to form an element of a ball Joint, saidouter'conductor consisting of a plurality oi semi-cylindrical tubularlinks oi relatively short length, each of said links having their endsformed to engage the end 01' another similar tubular link, each of saidlink ends shaped to engage the outer periphery of said insulated rings,each or said links Joined by a plurality oi metallic rings which arebent to conform with the ends 40 of said links, and said outer conductorhaving its inside provided with a lead sheath to insure air and watertight seal.

5. A flexible radio frequency line comprising inner and outerconductors, said outer conductor comprising a plurality oi split tubularlinks which are joined by insulated ball joints and a covering of coppertoil spirally wrapped around said outer conductor.

LUDWIG WALTER.

